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QLED (Quantum Dot LED) is just one of several LED types that make them Ultra High Definition. UHD TV's are 4K or 8K which means they have more lines of resolution, 4 thousand or 8 thousand and a fast processor that can keep up. There is a tech website www.cnet.com that can go into more detail about how clear each version of LED is. OLED is the current top of the line with a very bright and crisp picture.
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